My Grandmother/Grandfather/Great Aunt

That all live in St. Lawrence County, New York. My Grandmother Patty Dennis born 1953-living and her sister Doris Dennis 1957-living. Patty married Mitchel Lewis and had 1 son Mitchel Lewis Jr. Doris marries Roy Rogers Bell and had 2 kids Mitchelle Bell and Mike Bell. Roy Rogers Bell cheated and had 2 kids with (my grandmother) Patty My Dad and Bryan. Roy Rogers Bell died from Alchol. Doris Remarried John Green. Any info to go back father in this tree or maybe on my Grandfather Roy Rogers Bell. I can not ask them what they know because I have already did that so this is all i know.